How Many Layers Are Enough Per Instrument?

As few layers as possible, but no fewer you're trying to communicate an emotional statement. U so think about the families of sounds You have and how they interact with each other. And think about your layers in that respect. So don't worry abut how many guitar layers you hve, ad ow any sint layers you have. But worry about how those layers are interacting with each other as discreet components of the arrangement.